Question

How many moles of nitrogen are in 5.0×10−2 mole of quinine?

Answer 1

Here is a link for quinine. It appears there are two N atoms in one mole quinine.
http://en.wikipedia.org/wiki/Quinine

So 0.05 mole quinine will contains twice that number of moles of N ATOMS. It will contain 0.05 moles N2 MOLECULES but I don't think that is the question..

Answer 2

.06